<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>1_字符串形式的ref</title>
    <!-- 引入 react核心库 -->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <!-- 引入 react-dom 用于支持操作DOM -->
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <!-- 引入 babel 用于将 jsx转为 js -->
    <script type="text/javascript" src="../js/babel.min.js"></script>
</head>
<body>
<div id="test"></div>
<script type="text/babel">
    class Demo extends React.Component {

        // 展示左侧输入框输入的数据
        showData = () => {
            //console.log(this.refs.input1);          // 这里是真实dom
            const {input1} = this.refs;
            alert(input1.value);
        }

        // 展示右侧输入框输入的数据
        showData2 = () => {
            const { input2 } = this.refs;
            alert(input2.value);
        }

        render() {
            return (
                <div>
                    <input ref="input1" type="text" placeholder="点击按钮提示数据" />&nbsp;
                    <button ref="btn1" onClick={this.showData}>点我提示左侧的数据</button>&nbsp;
                    <input ref="input2" onBlur={this.showData2}  type="text" placeholder="失去焦点提示数据" />
                </div>
            )
        }
    }

    ReactDOM.render(<Demo />, document.getElementById("test"));

</script>
</body>
</html>